Your problem is mostly cortisol. Your insulin management doesn't seem to be that bad. But a higher supra-iliac than subscapular tells me that you might be ingesting too much carbs for what your body needs.
However your subscap doesn't indicate genetic carbs intolerance as it is not drastically higher than other sites.
My recommendations would obviously depend on many questions I would ask (mostly regarding sleeping patterns and daily energy level fluctuations) but cortisol modulation would be my main concern.
I don't see an immediate need for insulin-modulating supplements; I would simply focus on not ingesting carbs except for the peri-workout period.